A high sensitivity Hi survey of the sky at δ ≤ -25°

作者： E. M. Arnal , E. Bajaja , J. J. Larrarte , R. Morras , W. G.L. Pöppel

DOI: 10.1051/AAS:2000134

关键词: Rms noise 、 Astrophysics 、 Brightness 、 Interstellar medium 、 Sensitivity (control systems) 、 Sky 、 Astronomy 、 Angular resolution 、 Resolution (electron density) 、 Galaxy 、 Physics

摘要: This paper reports on a high sensitivity 21-cm neutral hydrogen survey of the sky south 25 .A total 50980 positions lying galactic coordinate grid with points spaced by (4l,4b )=( 0:5/cos b ,0 :5), were observed 30 m dish Instituto Argentino de Radioastronom (IAR). The angular resolution is HPBW = 0 , and velocity coverage spans interval 450 km s 1 to +400 (LSR). ve- locity 1.27 nal rms noise entire database 0.07 K. brightness tempera- ture scale accurate 5%.